Well maybe other than Marlon Brando and Jack Nicholson, although it's arguable that Redford is bigger than Nicholson.

The only other living actors on Redford's level I can think of are Clint Eastwood and Sean Connery. I suppose there's also De Niro (but he shows up in everything), Pacino and Dustin Hoffman. I think the fact that De Niro and Hoffman were in Meet the Fockers kind of makes them a bit more common place.

Redford probably wouldn't have his name attached to any old movie unless he were really confident in it and it had a certain calibre.

Well Lions For Lambs got pretty well trounced by critics and flopped at the box office as I recall.

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"Spider-man is the Charlie Brown of the Marvel Universe." ~ Kevin Smith